Adjustable headrest

ABSTRACT

369,079. Head - rests. MITCHELL, T. W., Brussels, Ontario, Canada. May 28, 1931, No. 15580. [Class 52 (ii).] An adjustable head-rest comprises a telescopic element provided between the pad and the stock and consisting of an outer member slidably mounted in the stock and an inner member secured to the pad, teeth being provided on both the inner and outer members together with click and pawl means on the stock for engaging said teeth. Such a device is shown in the drawings, comprising a pad 14, stock 15, and two telescopic elements. Each telescopic element comprises an inner member 25 on the pad, and an outer tubular member 26 slidable within the stock. The members 25, 26 are toothed at 30, 31 and the teeth 31 are longitudinally interrupted by a slot so that the stepped clicks 34 can engage both sets of teeth. The clicks are pressed outwards by the spring 35 and can be withdrawn by pressure upon the button 39. The teeth 31 are made deeper than the teeth 30 so that the member 26 cannot be withdrawn until the member 25 has been withdrawn to its extreme position.

g- 1932- T. w. MITCHELL ADJUSTABLE HEADREST Filed May 15, 1951 I Mimi Vq l'mrentor mm- (m1? mm Patented Aug. 2, 1932 ETED STATES means THOMASWILLIS MITCHELL, OF BRUSSELS, ONTARIO, CANADA ADJUSTABLE I-IEADRESTApplication filed. May 15,

The invention relates to improvements in adjustable head-rests asdescribed in the present specification and shown in the accompanyingdrawing which forms part of the same. I

The invention primarily appertains to a barbers chairand has for itsobject to provide a compound head-rest which in addition to'theconventional adjustment by which it is m raised and lowered, has meansby which it may be shifted towards the natural position of the customershead when'comfortably reclining in the chair; By merely pulling thehead-rest "forward it is retained in one of' a 5 number of positionsover a wide range of adjustment. Whilst more or less some kind of aforward adjustment is always necessary to comfortably rest the head in abarbers chair, this is more particularly so in the case of parties whosebacks are in any way bent.

Such an adjustable head-rest promotes comfort in shaving or givingfacial treat ments, and furthermore is susceptible of analogous usagefor other chairs, such as a den tists chair. I

Referring to the drawing, Figure 1 is an elevation depicting thehead-rest supported in customary manner from the back of a barberschair. In this View the head-rest is 30 shown in its normal position. 7Figure 2 is a similar view' partly in section, but omitting thechair-back. In this view the head-rest is shown in an advanced position.F igures'3 to 8 inclusive depict a modification to that illustratedinthe previous figures.

Figure'3 is an elevation partly in section. Figure 3A depicts thehead-rest advanced and also partly in section. p I

Figure 4 is a plan view of the head-rest partly in section. v I

Figure 5 is across section taken on the line 5-5 of Figure 4. V

Figure 6 is a detail of one of the two telescopic supporting elements ofthe head-rest.

Figure 7' is a cross section thereof-on an" 1931. Serial No. 537,566.

sponding parts in each of the figures through out the drawing.

In the drawing, the reference numeral 10 generally denotes the back of abarbers chair,

and 11 the baror bars that extend lengthwise thereof to support thehead-rest 12. The bar or bars'll are usuallylengthwise adjustable bymeans of notches 13 so that the head rest may be rais-ed or lowered,which adjustment however does not form a invention. 1 In carrying outthe present invention the pad 14 of the head-rest is separate anddistinct from the stock 15, the latter-being rigidly secured to orintegral with the bar or bars 11, of which there are usually two. 7

In Figures 1 and 2, the pad 14 is mounted upon a rod 16 of which theremay be a pair part of the present if so desired. The rod 'isrfixedlyattach-ed to the pad and extends from its rear face 17' obliquely to thebars 11. Y Said rod is slidably mounted in the stock l5'and is providedwith a series of notches 18 longitudinally arranged.

19 is a pawl pivoted at 20 in the stock 15 and urged into engagementwith the notches 18 by a suitable spring as at 21. One end of the pawlis button-shaped as at 22 and is manually depressible for the purpose ofdisengaging the other end 23 from the engaged notch of the rod 16.

From the preceding description it will be manifest that when the pad 14is in its normal position its rear face 17 abuts the stock 15 and therod 16 projects outwardly from the stock-see Figure '1. When the pad ispulled outwardly from the stock the pawl or click rides over the notchesand by engaging in the adjacent notch precludes retrograde movement, seeFigure 2. Accordingly the head rest may be adjusted to a forwardposition that is comfortable to each individual customer.

It is recognlz ed that the projectionof the rod in the normal positionof the head rest is not desirable'as it might catch in the clothes ofthe operator; hence in the modification il- 7 lustrated in Figures 3 to8-inclus ive a telefl scopic construction is employed that obviatesthis. 7

In carrying this out, therod isreplaced by a telescopic member 24.,there preferably being a pair of such telescopic members as shown. Thesemembers are spaced from each other, and each consists of an inner member25 fixedly secured to the pad 14 and an outer member 26 in the form of atube that is slidable in the bore 27 of the stock 15. When thesetelescopic members are collapsed as shown in Figures 3 and 4 they do notproject rearwardly of the stock, but upon being extended support the padin a forward position as shown in Figure 3A.

The outer members 26 may have some means whereby their forward movementis limited and this could be accomplished in various ways, such as forexample a lengthwise slot as at 28 cut or otherwise fashioned in eachouter member so as to receive the end of a grub screw 29. In this casethe length of the slot determines the extent of movement of the outermembers. The inner member may likewise be supplied with means forlimiting its forward movement, such means however is not shown inasmuchas a similar expediency could be employed to that of the slot and grubscrew.

The inner and the outer members of each telescopic element are providedwith rack teeth as at 30 and 31 respectively. The pitch of the teeth ofthe inner member corresponds to that of the outer member and is inregister therewith. The teeth of the outer member are preferably of agreater depth and are longitudinally interrupted by a slot as at 32 thatrenders the inner teeth accessible.

The stock 15 has a suitable opening 33 eX- tending between the companiontelescopic members and at right angles thereto. In this opening isdisposed a pair of pawls or clicks 34, 34, preferably of a square crosssection, as illustrated, so as to slide in the opening 33 withoutturning; which opening is of a similar cross section for this purpose.

The clicks have their adjacent end faces separated by a space in whichis lodged a helical coil-spring 35 that engages said end faces in orderto apply pressure upon the clicks to urge them into engagement with theteeth of the respective inner and outer members of each telescopicmember. To enable each click to engage the teeth 31 and 32 at the sametime it has a stepped end 36 comprising an intermediate portion 36' thatenters the slot 32 so as to engage the teeth 30 of the inner member. Theouter portions 36, 36", engage the teeth 31.

It will be manifest that by this construction and arrangement of partsthe click of each telescopic element yields as the inner and the outermembers are withdrawn as the pad is pulled out. Retrograde movement oithese members is prevented by the engagement of their teeth with theclick. By reason of the teeth 31 of the outer member being slightlydeeper than the teeth 30 of the inner member, the outer member will notadvance until the inner member is fully drawn out.

Each click has a bifurcation 37 at their adjacent ends, in which is atransverse pin 38. Surmounting the clicks is a button 39 held in araised position by a spring 40 and having integral cams 41, 4:1, fittingin the respective bifurcations of the clicks. Said cams have inclinedfaces that engage the pins 38. Accordingly when it is desired towithdraw the clicks from the telescopic members it is simply necessaryto depress the button 39 so that the cams simultaneously force theclicks towards each other. \Vhen the clicks are retracted the pad can bepushed back to its normal position.

lVhat I claim is 1. A head-rest composed of a stock, a separate anddistinct pad, a telescopic element consisting of an outer memberslidably mounted in the stock and an inner member secured to the pad,teeth provided on said inner and said outer members, and click means forengaging said teeth to retain the members in various positions ofadjustment.

2. A head-rest composed of a stock, a separate and distinct pad, atelescopic element consisting of an outer member slidably mounted in thestock and an inner member secured to the pad, teeth provided on saidinner and said outer members, a click mounted in the stock and engagedwith said teeth, and means for actuating the click.

3. A head-rest composed of a stock, a separate and distinct pad, atelescopic element consisting of an outer member slidably mounted in thestock and an inner member secured to the pad, said outer member having alengthwise slot and teeth adjacent to the edges thereof, said innermember having teeth accessible through said slot, a stepped clickmounted in the stock and engaged with the teeth of the inner and theouter members at the same time, and means for actuating the click.

4:. A head-rest composed of a stock, a separate and distinct pad, atelescopic element consisting of an outer member slidably mounted in thestock and an inner member secured to the pad, said outer member having alengthwise slot and teeth adjacent to the edges thereof, said innermember having teeth accessible through said slot, a stepped clickmounted in the stock and engaged with the teeth of the inner and theouter members at the same time, a spring so mounted in. the stock as tourge the click into engagement with said teeth, a pin borne by theclick, a spring-urged button mounted in the aforesaid stock, a camintegral therewith, said cam having an inclined face for engaging thepin to retract the click.

5. A head-rest composed of a stock having a pair of parallel boresjoined by an opening. a telescopic element mounted in each of said boresand each composed of an outer tubular member slidable in the stock andan inner member, a pad secured to each inner member, each outer memberhaving a lengthwise slot and teeth adjacent thereto, said inner membershaving teeth accessible through the slots of the outer members, a pairof aligned clicks mounted in the opening of the stock and having steppedends for simultaneous engager ment of the teeth of both the inner andthe outer members of the respective telescopic elements, a compressionspring interposed between the click, the ends of the clicks adjacent tosaid spring being bifurcated, pins lodged in the said bifurcated ends, aspringurged button mounted in the stock, a pair of cams dependingtherefrom, said cams entering the bifurcated portions of the clicks andhaving inclined faces engaging said pins. 2O Signed at Wingham Ontario,Canada, the

28th day of April, 1931.

THOMAS WILLIS MITCHEL

